I have to agree with everything Stephen said. For those of you who disagree, go out and buy your Mac. All of you. Then, when Macs are finally popular enough to make a sufficient target, hundreds of thousands of black hat wearing nerds will be writing the same viruses for your precious Mac OS that you are now trying to avoid. In a sense, by trying to get away from the viruses, you will eventually expose yourself to them. So in other words, you can run from your troubles, but they will catch up to you. (IF Macs ever become that popular)
Microsoft Vista: Another Reason to Switch to Apple